Hydraulic air compressor



sept. 23, 1924. 1,509,094

M BALCKER HYDHAULJC AIR COMXRESSOR Filed June 15. 1923 5 Sheets-Sheet Eg I,

Sept. 23 1924.

M., BALCKER HYDRAULIC A I R COMPHES SOR Fned June 1s 1923 5 Sheets-Sheet 2 Il Q Sept. 23 i924.

M. BALCKER HYDRAULIC AIR COMPRESSOR Filed June 15 1923 5 Sheets-Sheet 3 lve/i251 Sept. 23 1924.

M. BALcKER HYDRAULIC AIR COMPRESSCR Filed June 15. 1923 5 Sheets-Sheet 4 umm IIIINIIl y Sept. '23, 1924.

M. BALCKER HYDRAULIC AIR COMPRESSOR 5 Sheets-Sheet 5 Filed June 15. 1923 Patented Sept. 23V7 1924.

UNITED STATES MAn'rEN BALCKER, or cmcaeo, n.LiNoIs.

vHYDRAULIC AIR COMPRESSOR. i

Application ledzJnne 15, 1923. Serial No. 645,486.,

To all whom 'it may concern: y

Be it known that '1, MAn'rEN BALCKER, a citizen of the United States, residing at Chicago, in the county of Cook and Stateof Illinois,- liave invented certain'ne'w and useful Improvements in Hydraulic Air Compressors, of which the following is a speciiication. i Y

This invention relates to improvements in hydraulic air compressor` of 'the' type in which the air is compressed by columns ot' li uid through the medium of :i rotor orfimpgllcr which operates on the liquid to im art motion thereto and one of the objects o the invention is to provide an `improved apparatus of this character embodying means for automatically controlling or'-directing the course of llow of the liquid. r

proved apparatus of this character embodying means influenced by the liquid 'pressure for hanging the direction of flowV of the li ui j qA further object is to provide an improved apparatus of this character in which Athe rotor or impeller will be balanced in Vits chamber.

To the attainment of these ends and the accomplishment of other'new and Yuseful o'bjects asA will appear, the invention .consists in the features of novelty in substantially theV construction, -combination and arrangement of thc several parts,'hcreinafter more fully described and 4claimed and shown in the accompanying drawings this invention and in which y Fi ure 1 is a vertical, longitudinal sectiona view of an apparatus constructed in accordance with the principles of this invention and as taken on line 1-1, Figure V2. Figure 2 is a vertical sectional view taken illustrating on line 2-2, Figure 1.

Figure 3 is a detail, vertical sectional view taken on line 3--3, Figure 2.

Figure 4 is a detail sectional view taken on line 4-4,Figure 2.

Figure 5 isa horizontal sectlonal viewy taken online 5 5, Figure 1.

Figure 6 is a to plan view of Figure 1.

Figure 7 4is a orizontal sectional view taken on line 7-i' Fi re 1.

Figure 8 is a "orizontaLsectional viewtaken on line 8;8, Fi re 3.

in the numerals 10. and 11 designate `cyl in ers of anyl desired si1ze.,and.diameter.

`their bottoms with openin the 'cutoff for the openingsin the "Fliese cylinders are preferably arranged uprightly and are provided respectively in 12-l3, through which openings `liquid will iow from antil intona chamber 14 arranged beneath th cylinders. A The openings 12-13 are respectively con-5 ltrollcd by means of cut' -ol devices 15--16 in the form of valves and are-respectivel provided with openings 17-18 therein a pated to be moved into and out of register with the respective openings 12, and 13 when the 'valve *.or cut ol'l' members are rotated. The 'cut ofi' or valve member 15 is4 provided with a stem`19 rotatably mounted in a suitable bcari g 20 and the cut ol. member 16 is provide with a similar stem 21 rotatably mounted in a suitable bearing 22. A further object'is to providea'n iml The'cutoff members 15 are connected for oscillation unison so that when one of them is moved to uncover-the respective inlct openings in the bottom of the c linder ottom of the otler cylinder will be closed, and vice VelSIl.

Any suitable means ma be provided for accomplishin this result ut there is preferably'provi ed a' crank arm 23 which is connected with the stem 19 of the cut oli 15 4and a crank arm 24 connected with the stem of the cutoff. 16 (see particularly Figurcs` and 5). Alink 25 1s pivotally Vconnected with each of the crank arms 23 and 24 and through the medium of this link when one\of the cut oils is rotated toopen the ports which it controls the other cut oi will be rotated to close its respective ports.

The cut ot 15 is provided with an yu wal-diy extending and slightly -curved eiiectoror baille 26, and the Acut o 16 is provided with a. similar deflector or bathe 27,

for urposes whicliwill be later described. ie lcylinderl() is provided with an air inlet; o ning'28(see particularly Figure 1) contro led by a s ring influenced valve 29 and is also provi ed with a discharge out let opening controlled by a spring con trolled valve 30; The valves 29 an'dlBO open in opposition to each other and the valve 30 gu .32 leads.A l Referring more particularly, ,to the draw- Thecylinder 11 is provided with an, r inlet opening 33 controlled by a spring in! uenced valve 34 and is also provided with a dischar e outlet o ening controlled by a spring in uenced va ve 35 the outlet opening having communication with the chamber 31. The valves 34 and 35 also work in opposition to eachother.

Floats 36-37 are respectively arranged in Y the chambers 10 and 11 and the chambers are respectively provided with supports or stops 38-39 arranged adjacent the bottom thereof, and which supports or stops are adapted to be engaged by the floats 36-37 for supporting the floats and for limiting their movement in one direction in the cylinders. A

Arranged beneath the chamber 14 is a rotor orimpeller chamber 40 (see'particularly Figure 7) and disposed within the chamber 40 is a rotor or impeller 41 which may be of any desired configuration .but is preferably of a cup shape formation having an upwardly extending peripheral wall 42, through which latter extend a plurality of outlet opcnin s 43. The bottom of the rotor is alsoprovi ed with openin 44 and the rotor or impeller is supporte bv means of a shaft 45 )ournaled in a suitable bearing 46 and restin in a step or bearing 47. Connected with t e shaft 45 is a pulley 48, by means of which the shaft is rotated.'

1f desired and in order to prevent the in1- peller from suckin or drawin in outside air a suitable packing 49 may 'arranged in a chamber or recess 50 formed in the bearing 46. The packing is preferablv of a U shape formation opening u wardly so that if there should be any ten ency.of theL outside air to enter the chamber 40 the packing will expand and will Vform a fluid tight o1nt. l Leading from the chamber 40 and preferabl arrangedtangential to the impeller are out et passages 51-52 which lead upwardly as at 53-54 (see particularly Figures 1, 2 and 3). By arrangin the passages 51-52 tangential to the impe ler it will be manifest that the centrifugal force or speed imarted to the liquid by the impeller'will not lie interfered with and the flow of the liquid from the impeller chamber and through the passages 51--52 will not be impeded.

The impeller- 41 is supported by the shaft 45 within the chamber 40 in sucha position -that it will be spaced from all of the WallsV of the chamber thereby permitting the liquid to completely surround or immerse the impeller and insuring a uniformpressure upon all points of the impellerfrom all faces thereof, thereby balancing the impeller.

A communicating passage 55 leads from the chamber 14 to-tlie impeller chamber 40 to supply the liquid to the impeller. Dis-- posed above the cut o's 15 and 16 is a valve chamber 56, within which is arranged a hollowgrotary valve 57: The valve chamber is provided with removable closures 58-59 'it will bc and removable elements (iO-G1, between which the valve is held. The member (it) may be secured in position b v means of a suitable securing device 62, and is hollow as at 63 to permit liquid to flow therethrough respectively brought into register with ports or passages 67--68, which latter are respectively provided-with discharge outlets (39- 70, adjacent the lower ends of the cylinders 10 and 11. These discharge outlets (iO-70 areres ctively so located with respect to the de ectors or bailies 26-27 on the cut oll's 15 and 16 that when liquid is allowed to dow throu h either of the passages 67-68 directed against one or the other of the detlectors or'batiles 26-27 according to the position of the valve 57 and thereby serve as a means for rotating the cut oil's so as to open or close the respective inlet openings 12--13 at the bottoms of the respective cylinders 10 and 11.

The dischar e outlets 53-54 leading from Vthe impeller c iamber 40 discharge into the valveI casin 56 (see particularly Figure 2) in rear of t e valve 57 so that liquid which is being dischargedby the impeller 4l from the impeller chamber 40 through either of the passages 53-54 will be directed into and through the lvalve 57 and therefrom through the openings (l5-66, through whichever of the passa es V67-68 is open by the position of the'vive 57. The ports 611-66 in the valve 57 are so arranged with respect to each other `that when the valve 57 is pnsi tioned to open one of the passages (ST-G8, the other passage will be closed by the valve.

It will therefore be manifest that the operation of the cut offs 1li-lli will be con trolled and influenced by the liquid beingr discharged through the passages (i7 and 68. In order therefore to change the` direction 0f llowof the liquid and to `eonlrul the op eration of the cut oll's 15 and 16. it is only liu necessary to control the valve 57. Means ,of the valve 57. A spring controlled valve 74 is arranged in the valve chamber 72v for' closing the passages 71 and 73. The valve i trolled valves 74 and 81 will 'the valve 57 and thelrelnovable closure 59 is cut away as at 79 (seeiparticularly Figures 2 and 4) and connected with the stern 64 of the valye 57 is a win 80 is adapted to operate ln the cut awa portion 79 of the member 60 and is so ari.`

ranged that it 'may bealternately moved into a position that it willY close the outlet openings of the assages 73-78. v y

Within the .va ve chamber 77 is a spring controlled valve 81 similar'to the valve 74 and the valve .chamber 77 has" communication with the chamber 31 through` a suitable passage 82. Under normal conditions the sprin conseate so as to respectivel close the passages] 1-73 and 76-78 butw en ressure'is excited upon the valves 74--81 cient to unseat the valves the passages will be opened so as'to permit liquid' from the respective cylinders 10 and 11 to flow through the respective passages 71-78 and 76-78 to be discharged against the win 80 to shift the latter and 1thereby notate te valve 57, it beingr understood that the pressure ofthe li uid will be exerted upon one side of the wing 80.

To start the apparatus a. suficient quantity of liquid is placed therein preferably through a fill opening closed by means/of a phi or closure 8 3, until the liquid has reac a redetermined level.l Inasmueh as the cut o s 15 and 16 operate in opposition to each other, it will be 'manifest` and as has been `before stated, they will be in positions that either one or the other of the openings 12-13 4in the bottoms of the cylinders l0 and 11 will be opened and the other will be closed. The valve 57 will be, positionedso as to cause either of the ports or passages -66 thereof to be`respectively in register with that one of the passages 67-68 which discharges the liquid into that one of the cylinders 10 or 11 in which the respective inlets 12--13 is closed by' the cut off 15 or 1B.

With the arts in this position, the` apparatus will-be ready to start and the ioats 36-37 will be resting upon the surfaceot.

the liquid.

The impeller is then started and a's it rotates the liquid in the impeller chamber 40 willfbe discharged through the"outlet passages 51-52 into the passages 53-54. One

80. This wing' of the passages 67-68, however, will he closed by the position ofthe valve 57` as for instance as shown in Fi nre 3. This will shut oil' the flow of the iquid through the passage 67 and the liquid will then circulate through the passages 53-54 into the valve easing 56 into. the valve 57, through the port 66 and into the cylinder 11, shifting thc cut oi 16 and closing the inlet passage 13 to the'cylinder 11. Any liquid which was contained in the cylinder 10 will flow out of the opening 12 in the bottom thereof into the chamber 14, through the passage 55 into the impeller chamber 40. The float 36 will be lowered with the lowering of the -liquid level until it engages 'and rests u on the stops andsupports 38. The liqui will be continuedto be forced into the cylinder 11 and as the liquid accumulates therein, the float 37 will rise. As the floatrises the air which is contained in the cylinder 1l above the float willbe compressed and after compression will unseat the valve 35 so that the air will be discharged into the lchamber 31 and out of theoutlet 32. Asthe liquid rises in the c linder 1l it will also rise in the passage 6 and the valve 81 will remain seated until the pressure exerted uponthe liquid will overcome the opposin pressure exerted upon the valve to unseat t ie latter. At just about this point in the operation the float 37 will assume the position shown in Figure 1, that is at the extreme top of the cylinder and will serve as a means for assisting in closing thc air outlet passage and the air inlet passage to that cylinder. AAs the pressure of the liquid increases in the cylinder 11, the same pressure will be manifested upon the column of liquid in the assage 76 and as the valve 81 is unseated t le assaue 78 will be opened so that the liquid will then flow from the passa e 78 (see Figures 1 and -4) to be discharged a ainst the. wing 80 on the valve stem 64. T is Jressure of the liquid on the wing 80 will shit from the position shown in Figure 4 so as to open the passage 67 and cause the wing 80 to `assume a position to close the passage 73. This o eration ofthe wing` 80 will rotate the va ve 57 and will shift the same from the position shown in Figure 3 to move the port 66 out of register with the passage 68 and cause the port 65 to move into re ister with the passage 67. The direction o How of the liquid will then he changed and the liquid will be diverted through the passage 67 and out of the outlet 69 at the bottom of the cylinder 10 against the baille or deilector 26. The im 'act or ressure ofthe hqulid upon this ba e 26-wil rotate the cut o t thelatter 5 and in so rotating the latter, the cut will be opened. `.The liquid will then, under the influence of the impeller 41, be drawn through thc opening 13 into the chamber 14 and through the passage 55 into the impeller chamber to be discharged therefrom through the passage, :'1 into the passage $13,' thence,to the valve casing 56 through the valve 57, out. of the portl'i. through the passage ,El and into the cylinder 10. As the liquid accumulates in the cylinder the float 36 will rise and compression-of the air will be created in the cylinder 10 in the same manner as described in connection with the cylinder 11. lVhen the pressure upon the liquid column in the passage 71 is sufficient'to unseat the valve 74 the liquid will flow through the passage T3 to he discharged against the vringl,r 80 connected with the valve stem 64 to shift the wing S0 back to the position shown in Figure 4. when one c rcle'of operation will he completed.

It Vwill therefore be manifest that with' this operation the liquid is causedto rise irst in one cylinder and then in the other, and as it rises'in one cylinder it falls or recedes in the other.

As the liquid falls or recedes in either one or the other of the cylinders 10 and 11 air will be sucked thereinto through the respective air inlet passages 253-433, as will be understood. and as the air compressed `and dischargedv from the cylinders it will enter the chamber 31.

lf desired andas a means for disposing of anyr excess liquid which may1 he discharged from ythe mssages 'T3-TS into the space 79 of the valve easing and on either side of the wing 80, there may be provided a passage-84 `(see particularly Figures 2 and 4) having inlets 85-86 coxnmnnieatins: with the space 79 on the opposite sides of the wings S0, and leading from this passage Si is :i passage 87 which has communication with the chamber 1 44 to convey the liquid hack to the chamber 14.

lYhile the preferred form of the invention hasl been herein shown and described. it' is to be understood that. various changes ma)r he made in vthe details of construction and in the combination and arrangement of the several parts. within the scope of the claims1 Without departing from the spirit of this invention. f

llhat is claimed as new is 1. A compressor embodying. a plurality ofv compressing chambers each having a fluid vinlet and an outlet for compressed fluid,

means for delivering a liquid into the chambers for compressing.:- the fluid, the said means including an impeller for creating a pressure upon the liquid, and means operating` automatically to cause the liquid to compress the fluid in the said chambers alternately.

2. A compressor embodying a plurality of compressing chambers each having a fluid inlet and an outlet 'for compressed fluid, means for delivering av liquid into the chambers for compressing the fluid, the said means including an impeller for creating a pressure upon .the liquid,and means operating automatically to cause the liquid to compress the fluid in the said chambers alter- 4nately, the last recited means embodying .means fordelivering a liquid into the cliambers for compressing the fluid, the said means including an impeller for creating a pressure upon the liquid, and means influeneed by the liquid pressurefor causing the duid to be compressed alternately in the saidfchambers.

4. A compressor embodying two compressing chambers each having a fluid inlet and an outlet for compressed fluid. an impeller for forcing liquid into the chambers for compressing the fluid therein, valve mechanism for changing the course of flow of the liquid from one chamber to the other. means operatively connected with the valve mechanism and directly operated upon b v the Aliquid for shifting the valve` and fluid controlled means for controlling the action of the liquid upon the first recited means. a 5. A compressor embodying two compressing chambers eachhaving a fluid inlet and an outlet for compressed fluid. an impeller for forcing -liquid into the chambers for compressing the fluid therein, valve meehanismifor changing the course of flow of the liquid from one chamber to the other, and means operating automatically to actuate the saidnfalve.

6. A compressor embodying two compressing chambers each having a fluid inlet and an outlet 4for compressed fluid, an inlpeller for forcing the liquid into vthe cham bers for compressing the fluid therein, and means -whereby the liquid pressure will op'- erate to cause the liquid to be Withdrawn from oneof the said chambers and supplied to the other of the chambers.

7. A compressor embodying two compressing chambers each having a fluid inlet` and an outlet for compressed fluid, an impeller for forcing the liquid into the charnbers for compressing the fluid therein. and means whereby the liquid pressure will opcrate to cause the liquid to be withdrawn from one of the said chambers and supplied to the other of the chambers, the said means including cut offdevices for cutting oil the supply of liquid to the cylinders and working in opposition to each other.

8. A compressor embodying. two com'- pr'essing chambers each having a duid inlet and an outlet for com ressed fluid, an impeller for forcing the liquid into the chambers for compressing the fluid therein, means whereby the liquid pressure will operate to cause the liquid to be withdrawn from oneof the said chambers and su plied to the other of the chambers, the said means incldi'n" cut off devices for cuttinG oil' the supply o liquid to the cylinders and working in opposition to each other, said cut off devices will be actuated by the action of theV liquid tbereu on.

9. A compressor embo ying two compressing chambers each having'at one end a valve controlled Huid inletI and an outlet for compressed fluid, a liquid inlet and outlet passage at the other end of each of the chambers, a liquid chamber with which the said liquid inlet and outlet passages l communicate whereb out of and into the liquid chamber through said assage, an impelleroperating u on the liqui a cut olf for each of the sai liquid passages, means causing the cut oli's Vto operate in opposition to each other, and means for changing the course of flow of the liquid to actuate the cut offs.

10. A compressor embodying two compressing chambers each having at one'end a valve controlledv Huid inlet and an 4outlet for compressed fluid, a liquid inlet and outlet passage at the other end of each of the chambers, a liquid chamber with which the said liquid inlet and outlet passages communicate whereby the liquid mayow out of and into the liquid chamber throu h said ssage, an impeller operating upon t e liquid, a cut oll for each of the said liquid passages, means causing the cut oi'l's to operate in oposition to each other, and means influenced y the liquid pressure for changing the course of flow of the liquid to actuate the cut offs.

11. A compressor embodying two compressing chambers each having at one end a valve controlled Huid inlet and an outlet for compressed fiuid, a liquid inlet and outlet passage at the other end of each of the chambers, a liquid chamber with which the said liquid inlet and outlet passages communicate whereby the liquid may How out of and into the liquid chamber through said passage, an impeller operating u )on the liquid, a Acut off for cach of the sai liquid passages, means causing the cut offs to Opf crate in opposition to eachother, a valve device for changing the course of.'low of the liquid to actuate the cut offs, and Huid pressure means for actuating the said valve des vice.

12. A compressor embodying two compression chambers each having a Huid inlet and an outlet for compressed duid, an impeller 3 brought into communication with the imand means whereby the the liquid may flow- 'causing theliqfujd to flow.

chamber'having communication with eachV ofthe compression chambersfan impeller inthe impeller chamber, means for causing the compression chambers to alternately peller chamber and alternately cut od' therefrom, fand means responsive inits operation to the liqui'd pressure for changing the course of How of the liquid to causethe latter to flow from one of the compression chambersinto the other.

13. A compressor embodying two compression chambers each having a Huid inlet and an'itlet for-compressed fluid animpeller chamber having communication with each of the compression chambers, an impeller in the impeller chamber, means for causing the compression chambers to be alternatelyabrou ht into communication with tl"impeller c amber and alternatel cut off therefrom, and means responsive 1n its operation tothe liquid lfessure for changing theicours'e of flow o the liquid to cause the latter to ilo'w lfrom one of the compression chambers into the other and through the im V ller while the direction of operation o the impeller remains constant.

14. A compressr embodying two compression chambers'each having a Huid inlet and a'rqgtlef" for compressediiuid, an im .peller cham er havin communication with each of the compressionchambers, an impeller in the impeller chamber, cut olf devices individual to the compression chambers for. controlling the communications 10 with the impeller chamber, means for changing the direction of How of the liquid for from one of the the other, means compression cha'inbers to whereby the change in the direction of flow of the liquid will actuate the said cut offs, and liquid pressure actuated means for controlling the actuation of the first recited means. l

15. A compressor embodying two com- H0 pression chambers each having a Huid inlet and an outlet for compressed Huid, an impeller chamber having communication with each of the compressionchambers, an impeller in the i ler chamber, cut off devices individual to the compression chambers for controlling the communications with the impeller chamber, means for changing the direction of flow of the liquid for causing the/liquid to How from one of 12 the com ression chambers to the other, means w ereby the4 change inthe direction of ilow of the liquid will actuate the said cut offs, the last recited means embed ing bailles connected with the said cut olf a apted to be impacted by the liquid,and liquid Vpressure actuated meansl for controlling the actuation of the rst recited means.

16. A compressor embody a. compression chamber havgng a duid inlet and an. 13

outlea for compressed fluid, an impeller chamber having communication with the compression chamber,- a cut oil orcontrolling the communication between the conipression and impeller chambers, means for changing the directioiL of ow imparted to the liquid b the impellcr, and means whereby the c iange in the direction of flow of the liquid will'actuate the said cut ofi'.

17. A compressor embodying a compres sion chamber having a fluid inlet and an outlet for compressed iluidf'an chamber having communication with the compression chamber, a cutoE for controlling the communication between the compression and` impeller chambers, means for chan in the direction 'of flow imparte the liquid by the impeller, while the direction of operation of the impeller remains constant, and means whereb i the change in the direction of iiow of the quid will actuate the said cut oi.

the liquid 18. A compressor embodying a com ression chamber having a fluid inlet an an outlet for compressed Huid, an impeller chamber having communication with the compression chamber, a cut oil for controlling the communication between the compression and impeller chambers, means for changing the direction of flow impa to the li uid by contro led means for controlling the actuation'of the last recited means, and means whereby the change in the direction of flow of the liquid will actnate the said cut oil.

19. A compressor embodying a compression chamber having a fluid inlet and an outlet .for compressed fluid, an impeller .cham.

ber having communication with the compression chamber, an impeller in the impel ler chamber, a'cut off for controlling the communication between the compression and impeller chambers, means operating automaticall at a predetermined time in the cycle vo operation of the apparatus for chanoine the direction of [low imparted to the liquid by the said impeller, and means whereby the change in direction of flow of the liquid will actuate the said cut ofi'.

20. A compressor embodying a compres sion'chamber having a fluid inlet and an outlet for compresse Huid, an impeller chamber havin compression chamber, an impeller in the impeller chamber, a cut oil' for controlling the communication between the compression and impeller chambers, means operating automatically at a predetermined time in the c cle of o eration of the apparatus for c angine the liquid by the said impeller, and means whereby the change in direction of flow of will act-nate the said cut oii', the last recited means embodying moans operatively connected ivith the said cut oti' and impeller Y dto' V ber havin the impeller, liquid pressure said chambers havin to the liquid communication with the t e direction of flow imparted to ber having" communication with .the conipression chamber, an inipcller in the iinpellei' chamber, a cut off for controlling the communication between the compression and iinpeller chambers, means operating antomatically at a predetermined time in the Cycle of operation of the apparatus for changing the direction of liowimparted to the liquid by the said inipeller and `while the direction 'of operation of the said impeller remains constant, and means whereby the change in direction 'ofdow ofthe liquid will actuate the said cut oil'.

22. A compressor embodying a compression Vchamber having a fluid inlet and an outlet for compressed fluid. an impeller chamcommunication with the comamber, a pressure balanced imeller in the impeller chamber, a cnt off for controlling the communication between the said chambers, means operating automatically at a predetermined time in the cycle of o eration of the apparatus'for changing the irection offlow imparted to the liquid biy the, said impeller, and means whereby t ie changein tie direction'of flow of the liquid will'actuate the said cut oil".

23. A compressor embodying two compression cliambeprs, each having a fluid` inlet and an outlet for compressed fluid, each o[ a liquid inlet and outlet passage, a cut o for each of the last rccited passages,means for imparting motion to Ycause the same to flow into oiieof the chambers Vto compress the Huid therein and but fof the other chamber to cause Huid to flow tliereinto, and means operatin automatically to change the dirmtiono How of the liquid.

24. A compressor embodying two conircssion chambers, each having a fluid .in- -et andl an outlet for compressed fluid, each of said chambers having a liquid inlet and outlet passage, a cut olf for each of the last recited passages, means for imparting motion to the li uid to cause the same to flow into one of t e chambers to compress the fluid therein and out of the other chamber to causfluid to flow ther-cinto, means where,- by the change in the direction of fiow of the liquid will automaticaily actuate the said cut offs, and means operating automatically to change'the direction of liow of the ,liquid 25.`A compressor embodying two comression chambers, each having a uid`inet and an outlet for Acompressed fluid, each of Vsaid chambers having a liquid inlet and outlet passage, a cut off for each of the lastY recited passages, means 'tion to the liquid pression to cause tlie'same to- How n, Il)

for imparting mo impacted by the liquid for actuating the cut 26. Al compressor embodyingV two compression chambers, each having a Huid inlet and an outlet for compressed fluid, eachof said chambers havin a liquid inlet and out-l let passage, a out ofor each of the last recited passages, means for imparting motion to the li uid to cause thesameto How into one of t e chambers to compress the fluid therein and out f the other chamber cause Huid to flow thereint'o, valve mechapression chambers,

lmsm fo'r cha ging the`direct1on of flow of the liquid, liquid "pressure actuated. meansfor automatically a u ating the valve mechanism, and means w ereb the changein the direction of flow of the iquid will actuafte the said cut offs.

27. A. .compressor embodying two comression chambers, each-having a fluid -inet and an outlet for compressed fluid, each of said chambers having a liquid/inlet and outlet passage, a cut oil' for each of the last recitedA passages, means for imparting motion l he liquid to cause the sam'e to How into one of the chambers to compress the fluidft trein and out of the other cham-V ber to cause fluid to flow Atherein-to, valve,

mechanism for changing the direction of flow of the liquid, li uid pressure actuated means for automatica ly actuating thcvalve mechanism, and I neans` whereby the chan c in the direction of flow of the liquid ,will actuate the said cut os, the lastrecited means embodying formations connected with the cut ol's and adapted to be impacted by the liquid.

28. 'A compressor embodying two compression chambers, each having a fluidsupply inlet and an outlet for comprcsseduid, a supply of liquid, moans for causingzthe liquid to flow into one of thc cham" compress fluid therein and out of't'h chamber to cause fluid to flow intoit'A ter, a liquid bypass passage for e, the chambers, a valve for controllin by-pass passage, said vvalve o ierati" change the direction of flow o the li pressure controlled means for actuatin i said valve, there being a liquid pn leading from each of the said chambersfi` conveying pressure to the last recited me and pressure controlled'means for contl ling the last recited passages.

29. A. compressor embodying two co' each having a fluid supi ply inlet and an outlet for compressed-Hui@ -a supply of liquid, means for causing the"l liquid to flow into one of the chambers to compress fluid therein and out of the other fatina' automati uid is lbeing delivered.

' the last recited p'ass'ages,

change the direction of chamber to cause Huid to flow into the latter, ali uid bypass passage for each of the cham ers, a valve for controlling the b -pass assage, said valve operating to c ange t e direction of flow'o the liquid, pressure controlled means for actuating the said valve, there being a liquid passage leading from each of the said chambers for conveying pressure to the last recited mean's, pressure controlled means for controlling the last recited calassages and means oper- /4 y the iquid, um chamber inw which the liq-y 30. A compressor' embod ing two compression chambers, each having a fluid supply inlet and an outlet for compressed liuid, asupply oliquid, means for causing the liquid to flow into one of the chambers to compress Huid, `therein and out of the other chamber to cause fluid to flow into the latter, a li uid by-pass passage for each of ltJhe ,cham rs, a v'alv foii controlling the .pass assaggi, mynsai` va ve o ratin to clange the direction of flow ofphe liqguid, pressure controlled means for actuating the said valve, there being a liquid passage' leading from each of the'said chambers for conveying pressure to the Ylast recited means, pressure lcontrolled vineens for controlling and means operating` automaticallyM to close the exit `of the liquid, that' chamber into which the liquid is being delivered, the lastfrecited means ing mechanisms res nsiveA in .its operation to thcvilow of the iquid.

31. A compressorembod ng two compression chambers, each having a Huid supply inlet and an`outlet for compressed fluid, a supply ol liquid, means for causing the liquid to flowyinto one of 'the chambers to compress fluid therein and out of the other chamber to cause fluid to flow into the latter, a liquid by-pass passage for each of the chambersa valve l by-pass passages, said valve o erating to flow o the liquid, pressure controlled means for actuating the said "valve, there being a liquid passage leading from cach of the said chambers for conveying pressure to the last recited means, pressure controlled means for controlling the last recited passages and means operating automatically to close to the exit of.

r the liquid, that chamber into which the liquid is being delivered, the last recited means embodying rut os and formations connect- K ed therewith adapted to be impacted by the liquid.

32. A compressor: embodying vtwo compression chambers each having a fluid inlet .and an outlet for compressed fluid, an im- 'peller chamber having communication with each of the compression chambers, an im- .pellerdn the impeller chamber, a supply of to c ose to the exit off.'

for controlling the y t e pressure upon the liquid in the last salldpassages will actuate the said valve to change the course of. flow of the liquid from one compression chamber to the other,l

means for automatically controlling the last said passages, and means whereby the change in the course of flow of the liquid will actuate the said eut o's.

33. A compressor embodying two compression chambers, Veach 4having avfliiid inlet and an outlet for compressed fluid, an impeller chamber havin communication with each of the compression chambers, an im peller in the impeller chamber, a' supply of liquid adapted to be caused to flow into one ofthe com ression chambers to compress the fluid t eiein and to flow `from the other compression chamber to draw fluid thm-cinto, cut oll's individual to the compression chambers and operating in op osition to each other, said cut oll's control in the communications between the impeller 51ambei and the respective compression chambers, liquid by-pass passaffes leading from each of the compression cil'iambers, a valve for controlling the by-pass passages, there being a liquid passage leading from each of the compression chambers, means whereby the pressure upon the liquid in the last said passages will actuate the said 'valve to change the course of flow of the liquid from one compression chamber to the other, means for automatically controlling the last said passages, and means responsive in opferation to the flow of the liquid for actuating the said cut offs.

34. A .compressor embodying two conipicssion chambers each having 'a fluid inlet and an outlet for compressed fluid, an impeller chamber having communication with cach of the compression chambers, an impeller in the impeller chamber, a supply of iquid adapted to -be'caused to flow into one of the compression chambers to compress the fluid therein and to flow. from the other compression chambers to draw fluid thereinto` cut offs individual to the compression chambersV and operating in opposition to each other. said cut cll's controlling the com-v Juuiiii-atioi-.s betuecn'theV impeller chamber and the respect-ive compression chambers, liquid bylpass passages leading from cach of the-compression chambers, a valve for controlling the by-pass passages, there being a liquid passage leading from each of the compression chambers, means whereby the pressure upon the liquid in the 4last said passages will actuatc the said valve to change the course of flow of the liquid from one compression chamber to the other, means for automatically controlling the last said passages, and means whereby the change in the course of flow of the liquid will actuate the said cut oils, the last recited means embodying' formations adapted to be impacted by the liquid for actuating the said cut offs.

-35. A compressor embodying two coinpression chambers each having a fluid inlet and an outlet for compressed fluid, an impeller chamber having-communication with each of the compression chambers, an impeller in the impeller chamber, a supply of liquid adapted to be' caused to flow into one of the compression ,chambers to compress the fluid therein and to flow fromthe other compression chamber to draw fluid thereinto, cut o's individual to the compression chambers and operating in opposition to each other, saidl out offs controlling the communications between the impeller chamber and the respective compression chambers, liquid by-pass passages leading from each of the compression chambers, a. valve for controlling the by-pass passages, there being a liquid passage leading from each of the compression chambers, a piston like element connected with the valve for actuating it, the liquid in the last recited passages adapted to impact said element. for actuating it to shift the valve to change the course of 'flow of the liquid, means operating automatically to control the flow of the liquid through the lust recited passages, and means operating automatically to actuate the said cut o's.

36. A `compressor embodying two cornpressionV chambers each having a Huid inlet and an outlet for compressed fluid, an impeller chamber having communication with euch of the compression chambers, lan imeller in the impeller chamber, a supply of iquid adapted to be caused to flow into one of the compiession chambers to compress the fluidtherein and to flow from the other compression chamber to draw fluid thereinto, cut offs individual to the compression chambers and operating in opposition to each other, said cutpofs controlling the communications between the impeller chamber and the respective com ression chambers, liquid by-pass passages ending from each of the compression chambers, a valve for controlling the by-pass passages, there being .a liquid' passage leading from' each of the ed to impact the said element for actuating it to shift the valve to change the course of flow o f the liquid, and means responsive in its operation to the pressure vin the last recited Passages for controlling the flow of the liquid through the latten In testimony whereof I have signed my name to this specification, on this 12th day of June, A. D. 1923.

MARTEN BALCKER. 

